JP2004235043A - Inspection method and inspection device for monitor line for laminated battery - Google Patents

Abstract

An object of the present invention is to reliably detect an incorrect wiring of a monitor line.
An inspection method for inspecting a plurality of monitor lines connected to a pair of electrodes at both ends and a plurality of separators in a laminated battery main body for the presence or absence of erroneous wiring, wherein adjacent monitor lines selected from the monitor lines are continuously adjacent to each other. Individual resistance measuring step (step 103) of measuring the resistance value between each pair of adjacent monitor lines of the three monitor lines to be performed, and the resistance between the pair of monitor lines located at both ends of the selected monitor line The total resistance measuring step (step 104) for measuring the value is compared with the total resistance value of all the resistance values measured in the individual resistance measuring step and the resistance value measured in the total resistance measuring step (step 105), and are equal. In the case of (1), it is determined that the connection of the monitor line is normal (step 106), and when they are not the same, it is determined that there is an erroneous wiring (step 10). ).
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electrode and a separator that are respectively connected to electrodes and separators located at both ends of a stacked battery body configured by connecting a plurality of cells in which an electrolyte is arranged between a pair of electrodes in series via a separator. The present invention relates to an inspection method and an inspection device for a monitor line for a laminated battery for inspecting the presence or absence of erroneous wiring for a plurality of monitor lines that can detect the potential of the monitor line.
[0002]
[Prior art]
A fuel cell 41 as shown in FIG. 3 is known as a stacked battery configured by connecting a plurality of unit cells (cells) in series. In this case, each of the unit cells CEa, CEb, CEc,..., CEg, CEh (hereinafter also referred to as “unit cell CE” unless otherwise distinguished) is composed of a pair of flat electrodes (a plus electrode Ep and a minus electrode). An electrolyte EL is sandwiched between the electrodes Em). The fuel cell 41 includes a stacked battery body (cell stack) 42 formed by stacking the unit cells CE having such a structure via a separator SE, and a pair of electrodes Ep located at both ends of the stacked battery body 42. , Em and a plurality of monitor lines MLa, MLb, MLc,..., MLh, MLi (hereinafter, in particular, connected to each of the separators SE to enable detection of the potentials of these electrodes Ep, Em and the separator SE. If not distinguished, it is also referred to as “monitor line ML”). In this case, each separator SE interposed between the unit cells CE separates different kinds of gas supplied to a pair of electrodes Ep and Em opposed to each other with the separator SE interposed therebetween, and separates the gas on both sides of the separator SE. It has a function of electrically connecting a pair of located unit cells CE. Accordingly, the plurality of unit cells CE stacked are connected in series by each SE.
[0003]
When the fuel cell 41 is shipped, it is necessary to inspect whether or not a defective unit cell CE is included in the stacked cell main body 42. On the other hand, even during the use of the fuel cell 41, some of the cells CE may deteriorate and a predetermined output may not be obtained. Therefore, it is necessary for the user to periodically perform the inspection to detect and replace the deteriorated cell CE. When detecting such a defective or deteriorated cell CE (hereinafter, also referred to as “defective cell CE”), generally, the output voltage of each cell CE in the fuel cell 41 to which a load is connected is described. Is measured, the measured output voltage is compared with a preset reference voltage, and when the measured output voltage is lower than the reference voltage, it is determined that the cell CE is defective or the like. In this case, since it is difficult to directly contact the voltmeter with each electrode Ep, Em and the separator SE of each cell CE in the fuel cell 41, for example, as disclosed in JP-A-8-315846, The output voltage of each unit cell CE is measured via a monitor line ML previously wired to each of the electrodes Ep and Em and the separator SE.
[0004]
Accordingly, in this type of fuel cell 41, as shown in FIG. 3, each monitor line ML needs to be accurately wired one by one to a corresponding pair of electrodes Ep and Em and each separator SE. For this reason, at the time of manufacturing the fuel cell 41, a monitor line inspection process is performed on each monitor line ML to check whether there is an erroneous wiring for each monitor line ML.
[0005]
Next, the outline of the monitor line inspection using the monitor line inspection device 51 that has been already developed by the inventor will be described. First, as shown in FIG. 4, the monitor line inspection device 51 is connected to the fuel cell 41. In this case, for example, the monitor line inspection device 51 is configured to be able to measure a resistance value between a pair of adjacent monitor lines ML, ML according to a four-terminal method. Next, a constant current I is supplied from the constant current source 5 to the fuel cell 41. In this state, the control discriminating unit 54 switches each switch SW of the switch box 3 so that a pair of adjacent monitor lines ML and ML are connected. The voltages (potential differences) Va, Vb, Vc,..., Vg, Vh (hereinafter, also referred to as “voltage V” unless otherwise distinguished) are sequentially measured by the voltage detection circuit 6. Next, the arithmetic circuit 7 measures (calculates) the resistance value between the pair of adjacent monitor lines ML, ML based on the measured voltage V and the current value of the constant current I. Next, the control determination unit 54 determines whether or not the measured resistance value falls within a preset reference resistance range (a range from the upper limit value Rmax to the lower limit value Rmin), and determines whether the measured resistance value falls within the reference resistance range. , It is determined that the pair of adjacent monitor lines ML, ML are both connected normally. On the other hand, when it is not included in the reference resistance range, the control determination unit 54 determines that an erroneous wiring has occurred in one of the pair of adjacent monitor lines ML, ML.
[0006]
In this monitor line inspection method, the resistance values (internal resistance values) Ra, Rb, Rc,..., Rg, Rh (hereinafter, also referred to as “resistance value R” unless particularly distinguished. FIG. 4) is assumed to be a substantially constant value (a state with little variation), and the maximum and minimum values of each resistance value R are defined as the upper and lower limits, respectively, to determine the above-described reference resistance range. Thereby, when each monitor line ML is correctly wired to each of the corresponding pair of electrodes Ep and Em and each separator SE, the resistance between the adjacent pair of monitor lines ML and ML becomes Of the cell CE to which the monitor line ML is connected, is always included in the reference resistance range. Therefore, erroneous wiring of the monitor line ML can be detected based on whether or not the measured resistance value between the pair of adjacent monitor lines ML, ML is within the reference resistance range. For example, as shown in FIG. 4, when the monitor lines MLa and MLb are normally wired one by one, the resistance between the adjacent pair of monitor lines MLa and MLb is equal to the internal resistance of the cell CEa. Ra is always included in the reference resistance range. Therefore, it can be determined that each monitor line ML is wired normally. On the other hand, when the wirings are alternately wired (miswired) like the monitor lines MLc and MLd shown in the same figure, the resistance value between the pair of adjacent monitor lines MLb and MLc is equal to that of the cells CEb and CEc. The total resistance value of the internal resistance values Rb and Rc is out of the reference resistance range. Therefore, it can be determined that an erroneous wiring exists.
[0007]
[Patent Document 1]
JP-A-8-315846 (page 2)
[0008]
[Problems to be solved by the invention]
However, this monitor line inspection method requires the following improvements. That is, this monitor line inspection method is based on the premise that the resistance value R of each unit cell CE is substantially constant, as described above. However, when the resistance values R of the individual cells CE vary greatly, the reference resistance range also widens. For this reason, even if the resistance value between a pair of adjacent monitor lines is the total resistance value of the resistance values (internal resistance values) R of the plurality of unit cells CE due to erroneous wiring, it may be included in the reference resistance range. is there. For example, when the internal resistance value of each unit cell CE connected in series is 5 mΩ, 0.6 mΩ, 8 mΩ, 3 mΩ, 0.7 mΩ, and 2 mΩ in order, all the monitor lines ML whose connection is normal are normal. In order to determine the reference resistance range, the maximum and minimum values of these internal resistance values need to be set to the upper limit value and the lower limit value, respectively. As a result, the reference resistance range is 0.6 mΩ or more and 8 mΩ or less. However, in this case, even if the resistance value between the pair of monitor lines becomes the total resistance value of adjacent 5 mΩ and 0.6 mΩ (5.6 mΩ) due to erroneous wiring, it is included in the reference resistance range. It is erroneously determined to be normal. As a matter of fact, the internal resistance value of each cell CE in the fuel cell 41 varies widely in the range of 0.4 mΩ to 10 mΩ. Therefore, it is difficult to reliably detect erroneous wiring by this monitor line inspection method, and it is preferable to be able to improve this point.
[0009]
The present invention has been made in view of such points to be improved, and has as its main object to provide an inspection method and an inspection apparatus for a monitor line for a laminated battery that can reliably detect an incorrect wiring of a monitor line. .
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the inspection method for a monitor line for a laminated battery according to claim 1, wherein a plurality of cells having an electrolyte disposed between a pair of electrodes are connected in series via a separator. And a plurality of monitor lines connected to each of the pair of electrodes and the respective separators located at both ends of the stacked battery main body and capable of detecting the potentials of the corresponding electrodes and the corresponding separators. A method for inspecting a monitor line for a laminated battery for inspecting the presence or absence of incorrect wiring for the monitor line, wherein each of adjacent monitor lines in at least three consecutive monitor lines selected from among the plurality of monitor lines is selected. An individual resistance measuring step of measuring a resistance value between a pair of monitor lines; and a pair of monitors located at both ends of the selected monitor line. The total resistance measuring step of measuring the resistance value between the two, and comparing the total resistance value of all the resistance values measured in the individual resistance measuring step with the resistance value measured in the total resistance measuring step, are equal to each other. In this case, the connection of the at least three monitor lines is determined to be normal, and when they are not equal, a determination step of determining that any of the at least three monitor lines has an erroneous wiring is performed.
[0011]
The inspection method for a laminated battery monitor line according to claim 2 is the inspection method for a laminated battery monitor line according to claim 1, wherein the inspection line is located at one end of the at least three selected monitor lines. By sequentially executing a selection process for at least three consecutive monitor lines including the monitor lines as inspection targets, the presence or absence of erroneous wiring is inspected for all of the plurality of monitor lines.
[0012]
The inspection device according to claim 3, wherein a plurality of unit cells in which an electrolyte is arranged between a pair of electrodes are connected in series via a separator, and a pair of battery cells located at both ends of the stacked battery body. Inspection for inspecting the presence or absence of erroneous wiring of the monitor line in a stacked battery including a plurality of monitor lines connected to each of the electrode and each of the separators and capable of detecting the potential of the corresponding electrode and the separator. An apparatus, wherein each pair of adjacent monitor lines in at least three consecutive monitor lines selected from among the plurality of monitor lines is located at both ends of the at least three monitor lines. A control determining unit that specifies a pair of monitor lines and determines whether there is an erroneous wiring for the at least three monitor lines; A resistance measurement unit that measures a resistance value between lines, and a connection switching unit that sequentially connects the pair of monitor lines specified by the control determination unit to the resistance measurement unit, the control determination unit includes: Comparing the measured total resistance value of the resistance value between each pair of adjacent monitor lines and the measured resistance value between the pair of monitor lines located at the both ends, when they are equal to each other, It is determined that the connection of the at least three monitor lines is normal, and when they are not equal, it is determined that an erroneous wiring has occurred in any of the at least three monitor lines.
[0013]
According to a fourth aspect of the present invention, in the inspection apparatus according to the third aspect, the control determination unit continuously includes the monitor line located at one end of the at least three selected monitor lines. By sequentially executing a selection process for at least three adjacent monitor lines as inspection targets, it is determined whether or not there is an erroneous wiring for all of the plurality of monitor lines.
[0014]
The inspection device according to claim 5, wherein the resistance measuring unit is a constant current source that outputs a constant current to the plurality of unit cells connected in series, and the connection switching unit. A voltage detection circuit for detecting a voltage between the pair of monitor lines connected by the voltage detection circuit, and calculating a resistance value between the pair of monitor lines based on the voltage detected by the voltage detection circuit and the current value of the constant current And an arithmetic circuit for performing the operation.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of an inspection method and an inspection apparatus for a monitor line for a laminated battery according to the present invention will be described with reference to the accompanying drawings. An example in which the fuel cell 41 described above is used as a measurement target cell as an example of a stacked battery will be described.
[0016]
As shown in FIG. 3, the fuel cell 41 includes a stacked battery body 42 configured by stacking a plurality of unit cells CE, CE via a separator SE, and a pair of electrodes located at both ends of the stacked battery body 42. A plurality of monitor lines ML are connected to each of Ep, Em and each separator SE, and are capable of detecting each potential of these electrodes Ep, Em and separator SE.
[0017]
Next, the configuration of the monitor line inspection device (inspection device) 1 will be described with reference to FIG.
[0018]
The monitor line inspection device 1 includes a resistance measuring unit 2, a switch box 3, and a control determining unit 4, as shown in FIG. In this case, the resistance measuring section 2 includes a constant current source 5, a voltage detection circuit 6, and an arithmetic circuit 7. The constant current source 5 supplies a constant current I to the stacked cell main body 42 of the fuel cell 41 when the control signal Sc1 is being input. The voltage detection circuit 6 measures a voltage V between the pair of monitor lines ML via the switch box 3. The arithmetic circuit 7 measures the resistance value between the pair of monitor lines ML, ML based on the voltage V between the pair of monitor lines ML, ML measured by the voltage detection circuit 6 and the current value of the constant current I (calculation). ) To output resistance value data Dr for the resistance value. The switch box 3 corresponds to a connection switching unit in the present invention, and includes a plurality of switches (relays, semiconductor switch elements, and the like) SW, and connects the voltage detection circuit 6 of the resistance measurement unit 2 to each monitor line ML. It is located between them. Further, the switch box 3 controls the on / off of each switch SW by the input control signal Sc2, so that an arbitrary pair of the monitor lines ML, ML among the plurality of monitor lines ML is connected to the voltage detection circuit 6. Connect to input terminal. The control determination unit 4 controls the switch box 3 and the constant current source 5 by outputting control signals Sc2 and Sc1 to the switch box 3 and the constant current source 5, respectively. The control determination unit 4 stores the resistance value data Dr output by the arithmetic circuit 7 in an internal memory, and detects an erroneous wiring of the monitor line ML based on the resistance value indicated by the resistance value data Dr.
[0019]
Next, a monitor line inspection process (inspection method) performed by the monitor line inspection device 1 will be described with reference to FIG.
[0020]
First, the control determination unit 4 operates the constant current source 5 by outputting the control signal Sc1 to start supplying the constant current I to the stacked battery main body 42 (step 100). Next, the control determination unit 4 determines whether there is an uninspected monitor line ML (step 101). (A set) of three consecutive monitor lines ML adjacent to each other (step 102). In the present embodiment, as an example, as an example, the control determination unit 4 first monitors from the monitor line MLa of the positive electrode Ep at one end of the stacked battery main body 42 toward the negative electrode Em at the other end. An inspection target set (MLa, MLb, MLc) including three monitor lines ML is selected in the order of the lines MLb, MLc. Next, the monitor line MLc includes the monitor line MLc at the most other end of the selected monitor lines ML. From the monitor line MLc toward the negative electrode Em at the other end, three monitor lines MLd and MLe are arranged in this order. (MLc, MLd, MLe) to be inspected, consisting of monitor lines ML adjacent to each other. These selection processes are sequentially executed, and as shown in FIG. 2, a set of monitor lines (MLa, MLb, MLc), a set of monitor lines (MLc, MLd, MLe), and a set of monitor lines (MLe, MLf) are arranged in the order of inspection. , MLg) and a set of monitor lines (MLg, MLh, MLi) are selected.
[0021]
Next, the control determination unit 4 determines a resistance value between all adjacent pairs of monitor lines ML, ML of the monitor lines (for example, MLa, MLb, MLc) selected as the inspection target (these resistance values are determined as follows). The resistance measuring unit 2 measures (calculates) the “individual resistance value”. (Step 103: individual resistance measurement step). In this case, all pairs of adjacent monitor lines ML are (MLa, MLb) and (MLb, MLc). Therefore, the control determination unit 4 outputs the control signal Sc2 to the switch box 3 to control the on / off of each switch SW, so that (MLa, MLb) and (MLb, MLc) form a pair of monitor lines ML in this order. , ML are designated and connected to the respective input terminals of the voltage detection circuit 6, and each time the voltage V between the pair of monitor lines ML, ML is measured by the voltage detection circuit 6. Then, the arithmetic circuit 7 is controlled based on the measured voltage V between each pair of monitor lines ML and the current value of the constant current I supplied by the constant current source 5 in accordance with the control of the control determination unit 4. Then, each resistance value (individual resistance value) between each pair of monitor lines ML, ML is sequentially measured, and each measured value is sequentially output to the control determination unit 4 as resistance value data Dr. At this time, the control determination unit 4 stores the input resistance value data Dr in the internal memory. In the fuel cell 41 shown in FIG. 4, among the monitor lines MLa, MLb, and MLc selected as inspection targets, the monitor lines MLa and MLb are respectively wired normally, and the monitor line MLc is interchanged with the monitor line MLd. Wired in state. Therefore, as shown in FIG. 2, the individual resistance value of the pair of monitor lines (MLa, MLb) is measured as the internal resistance value Ra of the cell CEa, and the other adjacent pair of monitor lines (MLb, MLc) is measured. Is measured as the total resistance value (Rb + Rc) of the internal resistance values Rb and Rc of the cells CEb and CEc.
[0022]
Next, the control determination unit 4 determines a resistance value between the pair of monitor lines ML, ML located at both ends of the monitor lines MLa, MLb, MLc to be inspected (this resistance value is also referred to as “overall resistance value”). Is measured by the resistance measuring unit 2. (Step 104: overall resistance measurement step). In this case, the monitor lines MLa and MLc correspond to a pair of monitor lines ML and ML located at both ends. Therefore, the control determination unit 4 outputs the control signal Sc2 to the switch box 3 to control the on / off of each switch SW, thereby specifying the pair of monitor lines (MLa, MLc) to specify the voltage detection circuit 6 And the voltage detection circuit 6 measures the voltage V between the two monitor lines ML, ML. The control determining unit 4 calculates a resistance value (overall resistance value) between the monitor lines MLa and MLc based on the measured voltage V between the monitor lines MLa and MLc and the current value of the constant current I. To measure. In this case, as shown in FIG. 2, the total resistance value is measured as the total resistance value (Ra + Rb + Rc) of the internal resistance values Ra, Rb, and Rc in the cells CEa, CEb, and CEc. Next, the arithmetic circuit 7 outputs the total resistance value as the resistance value data Dr to the control determination unit 4, and the control determination unit 4 stores the resistance value data Dr in the internal memory.
[0023]
Next, based on the resistance value data Dr stored in the internal memory, the control determination unit 4 determines each individual resistance value for all of the pair of adjacent monitor lines (MLa, MLb) and the monitor lines (MLb, MLc). And the total resistance of a pair of monitor lines (MLa, MLc) located at both ends obtained based on the resistance data Dr also stored in the internal memory. The value is compared (step 105). In this case, as for the monitor lines MLa, MLb, and MLc selected as inspection targets, as shown in FIG. 2, the total resistance value of the individual resistance values is the total resistance value of the resistance value Ra and the resistance value (Rb + Rc), that is, ( Ra + Rb + Rc), and the total resistance value becomes the resistance value (Ra + Rb + Rc), so that both values are equal to each other. In this case, for example, when the ratio between the two is within a predetermined allowable range (within ± 10% as an example) or the difference between them is within a predetermined allowable range (within ± 1 mΩ as an example), the values of the two are made equal to each other. The same applies to the determination as to whether or not they are equal. Therefore, the control determination unit 4 determines that all of the selected monitor lines MLa, MLb, and MLc are normally connected (step 106). Next, the control determination unit 4 stores the determination result in the internal memory (Step 107), and returns to Step 101.
[0024]
Thereafter, the control determination unit 4 determines the inspection target such as a set of monitor lines (MLc, MLd, MLe), a set of monitor lines (MLe, MLf, MLg), and a set of monitor lines (MLg, MLh, MLi). While sequentially changing, an inspection process equivalent to the above-described inspection process for the set of monitor lines (MLa, MLb, MLc) is performed on each set, and the respective determination results are stored in the internal memory. In the present embodiment, as shown in FIG. 2, when a set of monitor lines (MLc, MLd, MLe) is to be inspected, a pair of adjacent monitor lines (MLc, MLd) and a monitor line The total resistance value (Rc + Rc + Rd) of the respective resistance values (individual resistance values) between (MLd, MLe) and the total resistance value (Rd) of the pair of monitor lines (MLc, MLe) are not equal to each other. The set of a pair of monitor lines (MLe, MLf, MLg) and the set of monitor lines (MLg, MLh, MLi) are equivalent to each other. Therefore, only when the set of monitor lines (MLc, MLd, MLe) is to be inspected, it is determined that there is an erroneous wiring in the selected monitor lines MLc, MLd, MLe after the comparison processing in step 105. (Step 108). Also at this time, the control determination unit 4 stores this determination result in the internal memory (step 107), and returns to step 101.
[0025]
Subsequently, the control determination unit 4 performs an inspection process on the set of the monitor lines (MLg, MLh, MLi), and when the process proceeds to step 101, determines that there is no untested monitor line ML, and proceeds to step 109. Move to Thereafter, in step 109, the control determination unit 4 reads the inspection result from the internal memory and outputs the read inspection result (for example, when the monitor line inspection device 1 has a display unit, Display the inspection result), and terminates the monitor line inspection process.
[0026]
As described above, according to the monitor line inspection method and the monitor line inspection apparatus 1, the resistance between all of the pair of adjacent monitor lines ML, ML in the three consecutive adjacent monitor lines ML selected as the inspection target. By comparing the total resistance value of the values and the resistance value between the pair of monitor lines ML, ML located at both ends, three adjacent monitor lines ML selected based on whether or not they are equal to each other are determined. It is determined whether or not the monitor line ML that is erroneously wired is included in the battery. Even if the internal resistance value of each cell CE in the fuel cell 41 greatly varies, the monitor line that is erroneously wired may be used. The presence of the line ML can be reliably detected.
[0027]
In addition, a plurality of monitors are sequentially executed by sequentially executing a selection process in which three consecutive monitor lines ML including a monitor line ML positioned at one end of the selected three monitor lines ML are to be inspected. By determining the presence or absence of erroneous wiring for all of the lines ML, the presence or absence of erroneous wiring in all of the monitor lines ML can be reliably and efficiently checked without omission. Further, a constant current source 5 for outputting a constant current I to the fuel cell 41, a voltage detection circuit 6 for detecting a voltage V between the pair of monitor lines ML, ML, and a current value of the detected voltage V and the constant current I And a calculation circuit 7 for calculating a resistance value between the pair of monitor lines ML based on the above, the resistance measuring unit 2 is configured, so that erroneous wiring in the plurality of monitor lines ML can be performed with a simple configuration. Since the presence can be reliably detected, the monitor line inspection device 1 can be configured at low cost.
[0028]
Note that the present invention is not limited to the above embodiment of the present invention. For example, in the above-described embodiment, an example has been described in which three consecutive monitor lines ML are selected as inspection targets from among the monitor lines ML. However, as long as the number is three or more, any adjacent N (3 or more natural numbers) monitor lines ML can be selected as inspection targets. However, when specifying the monitor line ML that is erroneously wired, it is preferable that the number of monitor lines ML selected as an inspection target is small. Therefore, it is preferable that three continuously adjacent monitor lines ML be inspected. Further, the power supply constituting the resistance measuring section in the present invention is not limited to a constant current source, but may be a power supply which outputs a current having a predetermined current value. In this configuration, the arithmetic circuit calculates a resistance value between the pair of monitor lines based on the voltage detected by the voltage detection circuit and a predetermined current value of the current output by the current source. Further, the present invention can be applied to inspection of monitor lines in various stacked batteries other than fuel cells.
[0029]
【The invention's effect】
As described above, according to the method for inspecting a monitor line for a laminated battery according to the first aspect and the inspection apparatus according to the third aspect, at least three consecutive monitors selected from a plurality of monitor lines. The resistance between each pair of adjacent monitor lines is measured, and the resistance between the pair of monitor lines located at both ends of the selected monitor line is measured. By comparing the total resistance value of the resistance values and the resistance value between a pair of monitor lines located at both ends, it is determined that the connection of each selected monitor line is normal when they are equal to each other, and selected when the connection is not equal. By judging that an incorrect wiring has occurred in any of the monitored monitor lines, the presence of the incorrectly wired monitor line can be determined even if the internal resistance of each unit cell in the stacked battery greatly varies. Sure It is possible to detect in.
[0030]
Further, according to the inspection method of the laminated battery monitor line of the second aspect and the inspection apparatus of the fourth aspect, a continuous line including the monitor line located at one end of the at least three selected monitor lines. By sequentially executing a selection process for at least three adjacent monitor lines as inspection targets, the presence or absence of erroneous wiring in the plurality of monitor lines is checked by checking for the presence of erroneous wiring in all of the plurality of monitor lines. Inspection can be performed reliably and efficiently without leakage.
[0031]
According to the inspection apparatus of the fifth aspect, a constant current source that outputs a constant current to a plurality of cells connected in series, a voltage detection circuit that detects a voltage between a pair of monitor lines, The resistance measuring unit includes a calculation circuit that calculates a resistance value between a pair of monitor lines based on the current values of the voltage and the constant current. Can be reliably detected, so that the inspection apparatus can be configured at low cost.
[Brief description of the drawings]
FIG. 1 is a flowchart showing a monitor line inspection process (monitor line inspection method) by a monitor line inspection device 1 according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram for explaining a monitor line inspection process by the monitor line inspection device 1.
FIG. 3 is a structural diagram of a fuel cell 41.
FIG. 4 is a block diagram of a monitor line inspection device 1 (51).
[Explanation of symbols]
1 Monitor line inspection device
2 Resistance measurement section
3 Switch box
4 Control discriminator
5 Constant current source
6. Voltage detection circuit
7 Operation circuit
41 Fuel cell
42 Stacked battery body
CE cell
EL electrolyte
Ep, Em electrode
I constant current
MLa to MLi monitor line
R resistance
SE separator
SW switch
Sc1, Sc2 control signal
V voltage

Claims (5)

A stacked battery body configured by connecting a plurality of cells in which an electrolyte is disposed between a pair of electrodes in series via a separator, and a pair of the electrodes and the respective separators located at both ends of the stacked battery body. In the inspection method for the monitor line for a laminated battery, which inspects the presence or absence of erroneous wiring of the monitor line in a laminated battery including a plurality of monitor lines that are connected to detect the potential of the corresponding electrode and the separator. So,
An individual resistance measuring step of measuring a resistance value between each pair of adjacent monitor lines in at least three consecutively adjacent monitor lines selected from the plurality of monitor lines;
An overall resistance measurement step of measuring a resistance value between a pair of monitor lines located at both ends of the selected monitor line,
A total resistance value of all the resistance values measured in the individual resistance measurement step is compared with the resistance values measured in the overall resistance measurement step, and when they are equal to each other, the connection of the at least three monitor lines is normal. And a determination step of determining that any of the at least three monitor lines has an erroneous wiring when they are not equal to each other. The plurality of the plurality of monitor lines selected by sequentially executing at least three monitor lines including the monitor line positioned at one end of the selected at least three monitor lines to be inspected are sequentially selected. The inspection method according to claim 1, wherein all of the monitor lines are inspected for the presence or absence of incorrect wiring. A stacked battery body configured by connecting a plurality of cells in which an electrolyte is disposed between a pair of electrodes in series via a separator, and a pair of the electrodes and the respective separators located at both ends of the stacked battery body. An inspection device for inspecting the presence of erroneous wiring for the monitor line in a stacked battery including a plurality of monitor lines that can detect the potential of the corresponding electrode and the separator that are connected,
A pair of adjacent monitor lines and a pair of monitor lines located at both ends of the at least three monitor lines selected from the plurality of monitor lines are selected. A control determining unit for specifying and determining whether there is an erroneous wiring for the at least three monitor lines; a resistance measuring unit for measuring a resistance value between the pair of connected monitor lines; and a control determining unit. A connection switching unit that sequentially connects the pair of designated monitor lines to the resistance measurement unit,
The control determination unit compares the total resistance value of the measured resistance values of all the adjacent pairs of monitor lines with the measured resistance value of the pair of monitor lines located at both ends. An inspection apparatus that determines that the connection of the at least three monitor lines is normal when they are equal to each other, and determines that any of the at least three monitor lines has an erroneous wiring when they are not equal. The control determination unit sequentially executes a selection process in which at least three continuously adjacent monitor lines including the monitor line located at one end of the selected at least three monitor lines are to be inspected. The inspection apparatus according to claim 3, wherein the presence or absence of erroneous wiring is determined for all of the plurality of monitor lines. The resistance measurement unit, a constant current source that outputs a constant current to the plurality of cells connected in series, a voltage detection circuit that detects a voltage between the pair of monitor lines connected by the connection switching unit, The inspection apparatus according to claim 3, further comprising: an arithmetic circuit configured to calculate a resistance value between the pair of monitor lines based on the voltage detected by the voltage detection circuit and the current value of the constant current. .

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